SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/ide/ide-proc.c

   1 /*
   2  *  Copyright (C) 1997-1998     Mark Lord
   3  *  Copyright (C) 2003          Red Hat <alan@redhat.com>
   4  *
   5  *  Some code was moved here from ide.c, see it for original copyrights.
   6  */
   7
   8 /*
   9  * This is the /proc/ide/ filesystem implementation.
  10  *
  11  * Drive/Driver settings can be retrieved by reading the drive's
  12  * "settings" files.  e.g.    "cat /proc/ide0/hda/settings"
  13  * To write a new value "val" into a specific setting "name", use:
  14  *   echo "name:val" >/proc/ide/ide0/hda/settings
  15  */
  16
  17 #include <linux/module.h>
  18
  19 #include <asm/uaccess.h>
  20 #include <linux/errno.h>
  21 #include <linux/proc_fs.h>
  22 #include <linux/stat.h>
  23 #include <linux/mm.h>
  24 #include <linux/pci.h>
  25 #include <linux/ctype.h>
  26 #include <linux/ide.h>
  27 #include <linux/seq_file.h>
  28
  29 #include <asm/io.h>
  30
  31 static struct proc_dir_entry *proc_ide_root;
  32
  33 static int proc_ide_read_imodel
  34         (char *page, char **start, off_t off, int count, int *eof, void *data)
  35 {
  36         ide_hwif_t      *hwif = (ide_hwif_t *) data;
  37         int             len;
  38         const char      *name;
  39
  40         switch (hwif->chipset) {
  41         case ide_generic:       name = "generic";       break;
  42         case ide_pci:           name = "pci";           break;
  43         case ide_cmd640:        name = "cmd640";        break;
  44         case ide_dtc2278:       name = "dtc2278";       break;
  45         case ide_ali14xx:       name = "ali14xx";       break;
  46         case ide_qd65xx:        name = "qd65xx";        break;
  47         case ide_umc8672:       name = "umc8672";       break;
  48         case ide_ht6560b:       name = "ht6560b";       break;
  49         case ide_rz1000:        name = "rz1000";        break;
  50         case ide_trm290:        name = "trm290";        break;
  51         case ide_cmd646:        name = "cmd646";        break;
  52         case ide_cy82c693:      name = "cy82c693";      break;
  53         case ide_4drives:       name = "4drives";       break;
  54         case ide_pmac:          name = "mac-io";        break;
  55         case ide_au1xxx:        name = "au1xxx";        break;
  56         case ide_palm3710:      name = "palm3710";      break;
  57         case ide_acorn:         name = "acorn";         break;
  58         default:                name = "(unknown)";     break;
  59         }
  60         len = sprintf(page, "%s\n", name);
  61         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
  62 }
  63
  64 static int proc_ide_read_mate
  65         (char *page, char **start, off_t off, int count, int *eof, void *data)
  66 {
  67         ide_hwif_t      *hwif = (ide_hwif_t *) data;
  68         int             len;
  69
  70         if (hwif && hwif->mate)
  71                 len = sprintf(page, "%s\n", hwif->mate->name);
  72         else
  73                 len = sprintf(page, "(none)\n");
  74         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
  75 }
  76
  77 static int proc_ide_read_channel
  78         (char *page, char **start, off_t off, int count, int *eof, void *data)
  79 {
  80         ide_hwif_t      *hwif = (ide_hwif_t *) data;
  81         int             len;
  82
  83         page[0] = hwif->channel ? '1' : '0';
  84         page[1] = '\n';
  85         len = 2;
  86         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
  87 }
  88
  89 static int proc_ide_read_identify
  90         (char *page, char **start, off_t off, int count, int *eof, void *data)
  91 {
  92         ide_drive_t     *drive = (ide_drive_t *)data;
  93         int             len = 0, i = 0;
  94         int             err = 0;
  95
  96         len = sprintf(page, "\n");
  97
  98         if (drive) {
  99                 __le16 *val = (__le16 *)page;
 100
 101                 err = taskfile_lib_get_identify(drive, page);
 102                 if (!err) {
 103                         char *out = ((char *)page) + (SECTOR_WORDS * 4);
 104                         page = out;
 105                         do {
 106                                 out += sprintf(out, "%04x%c",
 107                                         le16_to_cpup(val), (++i & 7) ? ' ' : '\n');
 108                                 val += 1;
 109                         } while (i < (SECTOR_WORDS * 2));
 110                         len = out - page;
 111                 }
 112         }
 113         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 114 }
 115
 116 /**
 117  *      ide_find_setting        -       find a specific setting
 118  *      @st: setting table pointer
 119  *      @name: setting name
 120  *
 121  *      Scan's the setting table for a matching entry and returns
 122  *      this or NULL if no entry is found. The caller must hold the
 123  *      setting semaphore
 124  */
 125
 126 static const struct ide_devset *ide_find_setting(const struct ide_devset **st,
 127                                                  char *name)
 128 {
 129         while (*st) {
 130                 if (strcmp((*st)->name, name) == 0)
 131                         break;
 132                 st++;
 133         }
 134         return *st;
 135 }
 136
 137 /**
 138  *      ide_read_setting        -       read an IDE setting
 139  *      @drive: drive to read from
 140  *      @setting: drive setting
 141  *
 142  *      Read a drive setting and return the value. The caller
 143  *      must hold the ide_setting_mtx when making this call.
 144  *
 145  *      BUGS: the data return and error are the same return value
 146  *      so an error -EINVAL and true return of the same value cannot
 147  *      be told apart
 148  */
 149
 150 static int ide_read_setting(ide_drive_t *drive,
 151                             const struct ide_devset *setting)
 152 {
 153         int val = -EINVAL;
 154
 155         if ((setting->flags & S_READ)) {
 156                 unsigned long flags;
 157
 158                 spin_lock_irqsave(&ide_lock, flags);
 159                 val = setting->get(drive);
 160                 spin_unlock_irqrestore(&ide_lock, flags);
 161         }
 162
 163         return val;
 164 }
 165
 166 /**
 167  *      ide_write_setting       -       read an IDE setting
 168  *      @drive: drive to read from
 169  *      @setting: drive setting
 170  *      @val: value
 171  *
 172  *      Write a drive setting if it is possible. The caller
 173  *      must hold the ide_setting_mtx when making this call.
 174  *
 175  *      BUGS: the data return and error are the same return value
 176  *      so an error -EINVAL and true return of the same value cannot
 177  *      be told apart
 178  *
 179  *      FIXME:  This should be changed to enqueue a special request
 180  *      to the driver to change settings, and then wait on a sema for completion.
 181  *      The current scheme of polling is kludgy, though safe enough.
 182  */
 183
 184 static int ide_write_setting(ide_drive_t *drive,
 185                              const struct ide_devset *setting, int val)
 186 {
 187         if (!capable(CAP_SYS_ADMIN))
 188                 return -EACCES;
 189         if (setting->set && (setting->flags & S_NOLOCK))
 190                 return setting->set(drive, val);
 191         if (!(setting->flags & S_WRITE))
 192                 return -EPERM;
 193         if (val < setting->min || val > setting->max)
 194                 return -EINVAL;
 195         if (ide_spin_wait_hwgroup(drive))
 196                 return -EBUSY;
 197         setting->set(drive, val);
 198         spin_unlock_irq(&ide_lock);
 199         return 0;
 200 }
 201
 202 static ide_devset_get(xfer_rate, current_speed);
 203
 204 static int set_xfer_rate (ide_drive_t *drive, int arg)
 205 {
 206         ide_task_t task;
 207         int err;
 208
 209         if (arg < XFER_PIO_0 || arg > XFER_UDMA_6)
 210                 return -EINVAL;
 211
 212         memset(&task, 0, sizeof(task));
 213         task.tf.command = ATA_CMD_SET_FEATURES;
 214         task.tf.feature = SETFEATURES_XFER;
 215         task.tf.nsect   = (u8)arg;
 216         task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT |
 217                         IDE_TFLAG_IN_NSECT;
 218
 219         err = ide_no_data_taskfile(drive, &task);
 220
 221         if (!err) {
 222                 ide_set_xfer_rate(drive, (u8) arg);
 223                 ide_driveid_update(drive);
 224         }
 225         return err;
 226 }
 227
 228 ide_devset_rw_nolock(current_speed, 0, 70, xfer_rate);
 229 ide_devset_rw_nolock(io_32bit, 0, 1 + (SUPPORT_VLB_SYNC << 1), io_32bit);
 230 ide_devset_rw_nolock(keepsettings, 0, 1, ksettings);
 231 ide_devset_rw_nolock(unmaskirq, 0, 1, unmaskirq);
 232 ide_devset_rw_nolock(using_dma, 0, 1, using_dma);
 233
 234 ide_devset_w_nolock(pio_mode, 0, 255, pio_mode);
 235
 236 ide_devset_rw(init_speed, 0, 70, init_speed);
 237 ide_devset_rw(nice1, 0, 1, nice1);
 238 ide_devset_rw(number, 0, 3, dn);
 239
 240 static const struct ide_devset *ide_generic_settings[] = {
 241         &ide_devset_current_speed,
 242         &ide_devset_init_speed,
 243         &ide_devset_io_32bit,
 244         &ide_devset_keepsettings,
 245         &ide_devset_nice1,
 246         &ide_devset_number,
 247         &ide_devset_pio_mode,
 248         &ide_devset_unmaskirq,
 249         &ide_devset_using_dma,
 250         NULL
 251 };
 252
 253 static void proc_ide_settings_warn(void)
 254 {
 255         static int warned;
 256
 257         if (warned)
 258                 return;
 259
 260         printk(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is "
 261                             "obsolete, and will be removed soon!\n");
 262         warned = 1;
 263 }
 264
 265 static int proc_ide_read_settings
 266         (char *page, char **start, off_t off, int count, int *eof, void *data)
 267 {
 268         const struct ide_devset *setting, **g, **d;
 269         ide_drive_t     *drive = (ide_drive_t *) data;
 270         char            *out = page;
 271         int             len, rc, mul_factor, div_factor;
 272
 273         proc_ide_settings_warn();
 274
 275         mutex_lock(&ide_setting_mtx);
 276         g = ide_generic_settings;
 277         d = drive->settings;
 278         out += sprintf(out, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n");
 279         out += sprintf(out, "----\t\t\t-----\t\t---\t\t---\t\t----\n");
 280         while (*g || (d && *d)) {
 281                 /* read settings in the alphabetical order */
 282                 if (*g && d && *d) {
 283                         if (strcmp((*d)->name, (*g)->name) < 0)
 284                                 setting = *d++;
 285                         else
 286                                 setting = *g++;
 287                 } else if (d && *d) {
 288                         setting = *d++;
 289                 } else
 290                         setting = *g++;
 291                 mul_factor = setting->mulf ? setting->mulf(drive) : 1;
 292                 div_factor = setting->divf ? setting->divf(drive) : 1;
 293                 out += sprintf(out, "%-24s", setting->name);
 294                 rc = ide_read_setting(drive, setting);
 295                 if (rc >= 0)
 296                         out += sprintf(out, "%-16d", rc * mul_factor / div_factor);
 297                 else
 298                         out += sprintf(out, "%-16s", "write-only");
 299                 out += sprintf(out, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor);
 300                 if (setting->flags & S_READ)
 301                         out += sprintf(out, "r");
 302                 if (setting->flags & S_WRITE)
 303                         out += sprintf(out, "w");
 304                 out += sprintf(out, "\n");
 305         }
 306         len = out - page;
 307         mutex_unlock(&ide_setting_mtx);
 308         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 309 }
 310
 311 #define MAX_LEN 30
 312
 313 static int proc_ide_write_settings(struct file *file, const char __user *buffer,
 314                                    unsigned long count, void *data)
 315 {
 316         ide_drive_t     *drive = (ide_drive_t *) data;
 317         char            name[MAX_LEN + 1];
 318         int             for_real = 0, mul_factor, div_factor;
 319         unsigned long   n;
 320
 321         const struct ide_devset *setting;
 322         char *buf, *s;
 323
 324         if (!capable(CAP_SYS_ADMIN))
 325                 return -EACCES;
 326
 327         proc_ide_settings_warn();
 328
 329         if (count >= PAGE_SIZE)
 330                 return -EINVAL;
 331
 332         s = buf = (char *)__get_free_page(GFP_USER);
 333         if (!buf)
 334                 return -ENOMEM;
 335
 336         if (copy_from_user(buf, buffer, count)) {
 337                 free_page((unsigned long)buf);
 338                 return -EFAULT;
 339         }
 340
 341         buf[count] = '\0';
 342
 343         /*
 344          * Skip over leading whitespace
 345          */
 346         while (count && isspace(*s)) {
 347                 --count;
 348                 ++s;
 349         }
 350         /*
 351          * Do one full pass to verify all parameters,
 352          * then do another to actually write the new settings.
 353          */
 354         do {
 355                 char *p = s;
 356                 n = count;
 357                 while (n > 0) {
 358                         unsigned val;
 359                         char *q = p;
 360
 361                         while (n > 0 && *p != ':') {
 362                                 --n;
 363                                 p++;
 364                         }
 365                         if (*p != ':')
 366                                 goto parse_error;
 367                         if (p - q > MAX_LEN)
 368                                 goto parse_error;
 369                         memcpy(name, q, p - q);
 370                         name[p - q] = 0;
 371
 372                         if (n > 0) {
 373                                 --n;
 374                                 p++;
 375                         } else
 376                                 goto parse_error;
 377
 378                         val = simple_strtoul(p, &q, 10);
 379                         n -= q - p;
 380                         p = q;
 381                         if (n > 0 && !isspace(*p))
 382                                 goto parse_error;
 383                         while (n > 0 && isspace(*p)) {
 384                                 --n;
 385                                 ++p;
 386                         }
 387
 388                         mutex_lock(&ide_setting_mtx);
 389                         /* generic settings first, then driver specific ones */
 390                         setting = ide_find_setting(ide_generic_settings, name);
 391                         if (!setting) {
 392                                 if (drive->settings)
 393                                         setting = ide_find_setting(drive->settings, name);
 394                                 if (!setting) {
 395                                         mutex_unlock(&ide_setting_mtx);
 396                                         goto parse_error;
 397                                 }
 398                         }
 399                         if (for_real) {
 400                                 mul_factor = setting->mulf ? setting->mulf(drive) : 1;
 401                                 div_factor = setting->divf ? setting->divf(drive) : 1;
 402                                 ide_write_setting(drive, setting, val * div_factor / mul_factor);
 403                         }
 404                         mutex_unlock(&ide_setting_mtx);
 405                 }
 406         } while (!for_real++);
 407         free_page((unsigned long)buf);
 408         return count;
 409 parse_error:
 410         free_page((unsigned long)buf);
 411         printk("proc_ide_write_settings(): parse error\n");
 412         return -EINVAL;
 413 }
 414
 415 int proc_ide_read_capacity
 416         (char *page, char **start, off_t off, int count, int *eof, void *data)
 417 {
 418         int len = sprintf(page, "%llu\n", (long long)0x7fffffff);
 419         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 420 }
 421
 422 EXPORT_SYMBOL_GPL(proc_ide_read_capacity);
 423
 424 int proc_ide_read_geometry
 425         (char *page, char **start, off_t off, int count, int *eof, void *data)
 426 {
 427         ide_drive_t     *drive = (ide_drive_t *) data;
 428         char            *out = page;
 429         int             len;
 430
 431         out += sprintf(out, "physical     %d/%d/%d\n",
 432                         drive->cyl, drive->head, drive->sect);
 433         out += sprintf(out, "logical      %d/%d/%d\n",
 434                         drive->bios_cyl, drive->bios_head, drive->bios_sect);
 435
 436         len = out - page;
 437         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 438 }
 439
 440 EXPORT_SYMBOL(proc_ide_read_geometry);
 441
 442 static int proc_ide_read_dmodel
 443         (char *page, char **start, off_t off, int count, int *eof, void *data)
 444 {
 445         ide_drive_t     *drive = (ide_drive_t *) data;
 446         char            *m = (char *)&drive->id[ATA_ID_PROD];
 447         int             len;
 448
 449         len = sprintf(page, "%.40s\n", m[0] ? m : "(none)");
 450         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 451 }
 452
 453 static int proc_ide_read_driver
 454         (char *page, char **start, off_t off, int count, int *eof, void *data)
 455 {
 456         ide_drive_t     *drive = (ide_drive_t *) data;
 457         struct device   *dev = &drive->gendev;
 458         ide_driver_t    *ide_drv;
 459         int             len;
 460
 461         if (dev->driver) {
 462                 ide_drv = container_of(dev->driver, ide_driver_t, gen_driver);
 463                 len = sprintf(page, "%s version %s\n",
 464                                 dev->driver->name, ide_drv->version);
 465         } else
 466                 len = sprintf(page, "ide-default version 0.9.newide\n");
 467         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 468 }
 469
 470 static int ide_replace_subdriver(ide_drive_t *drive, const char *driver)
 471 {
 472         struct device *dev = &drive->gendev;
 473         int ret = 1;
 474         int err;
 475
 476         device_release_driver(dev);
 477         /* FIXME: device can still be in use by previous driver */
 478         strlcpy(drive->driver_req, driver, sizeof(drive->driver_req));
 479         err = device_attach(dev);
 480         if (err < 0)
 481                 printk(KERN_WARNING "IDE: %s: device_attach error: %d\n",
 482                         __func__, err);
 483         drive->driver_req[0] = 0;
 484         if (dev->driver == NULL) {
 485                 err = device_attach(dev);
 486                 if (err < 0)
 487                         printk(KERN_WARNING
 488                                 "IDE: %s: device_attach(2) error: %d\n",
 489                                 __func__, err);
 490         }
 491         if (dev->driver && !strcmp(dev->driver->name, driver))
 492                 ret = 0;
 493
 494         return ret;
 495 }
 496
 497 static int proc_ide_write_driver
 498         (struct file *file, const char __user *buffer, unsigned long count, void *data)
 499 {
 500         ide_drive_t     *drive = (ide_drive_t *) data;
 501         char name[32];
 502
 503         if (!capable(CAP_SYS_ADMIN))
 504                 return -EACCES;
 505         if (count > 31)
 506                 count = 31;
 507         if (copy_from_user(name, buffer, count))
 508                 return -EFAULT;
 509         name[count] = '\0';
 510         if (ide_replace_subdriver(drive, name))
 511                 return -EINVAL;
 512         return count;
 513 }
 514
 515 static int proc_ide_read_media
 516         (char *page, char **start, off_t off, int count, int *eof, void *data)
 517 {
 518         ide_drive_t     *drive = (ide_drive_t *) data;
 519         const char      *media;
 520         int             len;
 521
 522         switch (drive->media) {
 523         case ide_disk:          media = "disk\n";       break;
 524         case ide_cdrom:         media = "cdrom\n";      break;
 525         case ide_tape:          media = "tape\n";       break;
 526         case ide_floppy:        media = "floppy\n";     break;
 527         case ide_optical:       media = "optical\n";    break;
 528         default:                media = "UNKNOWN\n";    break;
 529         }
 530         strcpy(page, media);
 531         len = strlen(media);
 532         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 533 }
 534
 535 static ide_proc_entry_t generic_drive_entries[] = {
 536         { "driver",     S_IFREG|S_IRUGO,         proc_ide_read_driver,
 537                                                  proc_ide_write_driver },
 538         { "identify",   S_IFREG|S_IRUSR,         proc_ide_read_identify, NULL },
 539         { "media",      S_IFREG|S_IRUGO,         proc_ide_read_media,    NULL },
 540         { "model",      S_IFREG|S_IRUGO,         proc_ide_read_dmodel,   NULL },
 541         { "settings",   S_IFREG|S_IRUSR|S_IWUSR, proc_ide_read_settings,
 542                                                  proc_ide_write_settings },
 543         { NULL, 0, NULL, NULL }
 544 };
 545
 546 static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
 547 {
 548         struct proc_dir_entry *ent;
 549
 550         if (!dir || !p)
 551                 return;
 552         while (p->name != NULL) {
 553                 ent = create_proc_entry(p->name, p->mode, dir);
 554                 if (!ent) return;
 555                 ent->data = data;
 556                 ent->read_proc = p->read_proc;
 557                 ent->write_proc = p->write_proc;
 558                 p++;
 559         }
 560 }
 561
 562 static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
 563 {
 564         if (!dir || !p)
 565                 return;
 566         while (p->name != NULL) {
 567                 remove_proc_entry(p->name, dir);
 568                 p++;
 569         }
 570 }
 571
 572 void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver)
 573 {
 574         mutex_lock(&ide_setting_mtx);
 575         drive->settings = driver->settings;
 576         mutex_unlock(&ide_setting_mtx);
 577
 578         ide_add_proc_entries(drive->proc, driver->proc, drive);
 579 }
 580
 581 EXPORT_SYMBOL(ide_proc_register_driver);
 582
 583 /**
 584  *      ide_proc_unregister_driver      -       remove driver specific data
 585  *      @drive: drive
 586  *      @driver: driver
 587  *
 588  *      Clean up the driver specific /proc files and IDE settings
 589  *      for a given drive.
 590  *
 591  *      Takes ide_setting_mtx and ide_lock.
 592  *      Caller must hold none of the locks.
 593  */
 594
 595 void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver)
 596 {
 597         unsigned long flags;
 598
 599         ide_remove_proc_entries(drive->proc, driver->proc);
 600
 601         mutex_lock(&ide_setting_mtx);
 602         spin_lock_irqsave(&ide_lock, flags);
 603         /*
 604          * ide_setting_mtx protects the settings list
 605          * ide_lock protects the use of settings
 606          *
 607          * so we need to hold both, ide_settings_sem because we want to
 608          * modify the settings list, and ide_lock because we cannot take
 609          * a setting out that is being used.
 610          *
 611          * OTOH both ide_{read,write}_setting are only ever used under
 612          * ide_setting_mtx.
 613          */
 614         drive->settings = NULL;
 615         spin_unlock_irqrestore(&ide_lock, flags);
 616         mutex_unlock(&ide_setting_mtx);
 617 }
 618 EXPORT_SYMBOL(ide_proc_unregister_driver);
 619
 620 void ide_proc_port_register_devices(ide_hwif_t *hwif)
 621 {
 622         int     d;
 623         struct proc_dir_entry *ent;
 624         struct proc_dir_entry *parent = hwif->proc;
 625         char name[64];
 626
 627         for (d = 0; d < MAX_DRIVES; d++) {
 628                 ide_drive_t *drive = &hwif->drives[d];
 629
 630                 if (!drive->present)
 631                         continue;
 632                 if (drive->proc)
 633                         continue;
 634
 635                 drive->proc = proc_mkdir(drive->name, parent);
 636                 if (drive->proc)
 637                         ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
 638                 sprintf(name, "ide%d/%s", (drive->name[2]-'a')/2, drive->name);
 639                 ent = proc_symlink(drive->name, proc_ide_root, name);
 640                 if (!ent) return;
 641         }
 642 }
 643
 644 void ide_proc_unregister_device(ide_drive_t *drive)
 645 {
 646         if (drive->proc) {
 647                 ide_remove_proc_entries(drive->proc, generic_drive_entries);
 648                 remove_proc_entry(drive->name, proc_ide_root);
 649                 remove_proc_entry(drive->name, drive->hwif->proc);
 650                 drive->proc = NULL;
 651         }
 652 }
 653
 654 static ide_proc_entry_t hwif_entries[] = {
 655         { "channel",    S_IFREG|S_IRUGO,        proc_ide_read_channel,  NULL },
 656         { "mate",       S_IFREG|S_IRUGO,        proc_ide_read_mate,     NULL },
 657         { "model",      S_IFREG|S_IRUGO,        proc_ide_read_imodel,   NULL },
 658         { NULL, 0, NULL, NULL }
 659 };
 660
 661 void ide_proc_register_port(ide_hwif_t *hwif)
 662 {
 663         if (!hwif->proc) {
 664                 hwif->proc = proc_mkdir(hwif->name, proc_ide_root);
 665
 666                 if (!hwif->proc)
 667                         return;
 668
 669                 ide_add_proc_entries(hwif->proc, hwif_entries, hwif);
 670         }
 671 }
 672
 673 void ide_proc_unregister_port(ide_hwif_t *hwif)
 674 {
 675         if (hwif->proc) {
 676                 ide_remove_proc_entries(hwif->proc, hwif_entries);
 677                 remove_proc_entry(hwif->name, proc_ide_root);
 678                 hwif->proc = NULL;
 679         }
 680 }
 681
 682 static int proc_print_driver(struct device_driver *drv, void *data)
 683 {
 684         ide_driver_t *ide_drv = container_of(drv, ide_driver_t, gen_driver);
 685         struct seq_file *s = data;
 686
 687         seq_printf(s, "%s version %s\n", drv->name, ide_drv->version);
 688
 689         return 0;
 690 }
 691
 692 static int ide_drivers_show(struct seq_file *s, void *p)
 693 {
 694         int err;
 695
 696         err = bus_for_each_drv(&ide_bus_type, NULL, s, proc_print_driver);
 697         if (err < 0)
 698                 printk(KERN_WARNING "IDE: %s: bus_for_each_drv error: %d\n",
 699                         __func__, err);
 700         return 0;
 701 }
 702
 703 static int ide_drivers_open(struct inode *inode, struct file *file)
 704 {
 705         return single_open(file, &ide_drivers_show, NULL);
 706 }
 707
 708 static const struct file_operations ide_drivers_operations = {
 709         .owner          = THIS_MODULE,
 710         .open           = ide_drivers_open,
 711         .read           = seq_read,
 712         .llseek         = seq_lseek,
 713         .release        = single_release,
 714 };
 715
 716 void proc_ide_create(void)
 717 {
 718         proc_ide_root = proc_mkdir("ide", NULL);
 719
 720         if (!proc_ide_root)
 721                 return;
 722
 723         proc_create("drivers", 0, proc_ide_root, &ide_drivers_operations);
 724 }
 725
 726 void proc_ide_destroy(void)
 727 {
 728         remove_proc_entry("drivers", proc_ide_root);
 729         remove_proc_entry("ide", NULL);
 730 }